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I remember reading about the coins and subdivisions when I was younger. Due to my country being often invaded by the Ottomans (Romania) I have a lot more information on them. The coins are indeed silver Akce and Mangir if they are copper from the same period of time.
And the foreign coins were usually asked as tribute for leaving the countries alone. They couldn't hold Romania's territory under control but they could ensure that nothing would stand there by organizing frequent raids. So the leaders would pay tribute in gold, carriages full of coins in circulation in those areas. For example in Transylvania, a region with high German connections, the leadership would raise German coins and send them to the sultatane.
Great article! Keep on writing and don't forget to inspire others! We all make up a community and we all need to help it grow. It was a pleasure reading your article!

Thank you for the insight, and I will do that. In Croatia we had the same the Dalmatian hinterland was a border area between Venice and the Ottoman empire but still not so many coins found here. A lot more in Slavonia.